Malicious PDF — malware analysis report

Static analysis result for SHA-256 a40915b19f7e9555…

MALICIOUS

PDF

68.4 KB Created: 2021-01-05 02:44:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 06646f418ad8a9e51596340c3e200246 SHA-1: 8090517f41f57292607daa79002d3bb021cbadce SHA-256: a40915b19f7e9555d06b70b260c18689a82f497a905093a1896e082758747a01
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffnew.ru/123?utm_term=what+is+an+example+of+conditional+knowledge PDF link annotation
    • https://vupudotexim.weebly.com/uploads/1/3/4/8/134884591/lasovotupav_talilegedaro_gafapofus.pdfIn PDF document text
    • https://tijirurilulade.weebly.com/uploads/1/3/4/3/134312421/kuxivulo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390638/normal_5f91429f66b9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383302/normal_5f8d0abed826a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452834/normal_5ff35061ee8c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365582/normal_5fc5bd18087e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452594/normal_5fec7b61b64c6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaeae76f-d059-4260-826f-ea6bee622a72/javuju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccb0942b-425a-4166-9133-f74a4e54402b/33172438376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a5e888f-8052-4cc4-986b-e87dedf5bb07/jukokagelopomamodexuvewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e42c2be9-d82d-4851-9396-9af3fcc644a4/veviliral.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1742cb4c-ad7f-4fdb-ae9c-e09e57d2c303/83850751446.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEC 5708 bytes
SHA-256: ec66a1034cae0074f2c860fade99f6c93571fff3c51df6b5ae1a95413b5454f6
font_01_sfnt_off0000e057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE057 10824 bytes
SHA-256: a5439cf3eb5aac61fb8d6e30f218d58a99e1485434714832b05e4f9857a7f510